640548

素因数分解:

$2^2\times 3^5\times {\mathrm{659}}^1$

素因数の和:678

約数の個数: 36

約数和(自身を含む): 1681680

約数和(自身を除く): 1041132

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 81, 108, 162, 243, 324, 486, 659, 972, 1318, 1977, 2636, 3954, 5931, 7908, 11862, 17793, 23724, 35586, 53379, 71172, 106758, 160137, 213516, 320274, 640548]

約数ペア:

[(1, 640548), (2, 320274), (3, 213516), (4, 160137), (6, 106758), (9, 71172), (12, 53379), (18, 35586), (27, 23724), (36, 17793), (54, 11862), (81, 7908), (108, 5931), (162, 3954), (243, 2636), (324, 1977), (486, 1318), (659, 972)]